Coaxial cable connector



July 2, 1957 A. J. ZINK, JR 2,793,125

COAXIAL CABLE CONNECTOR Filed Aug. 1, 1955 INVENTOR. ALVIN I Z/NK BY EzEK/EL WOLF HIS ATTORNEY United States Patent COAXIAL CABLE CONNECTOR Alvin J. Zink, Jr., Andover, Mass, assignor to Tru- Connector Corporation, Lynn, -Mass., a corporation of Massachusetts Application August 1, '1955, Serial No. 525,529

6 Claims. 01. zoo-51.09

The present invention relates to a coupling connector primarily used for high frequency lines of the coaxial type and particularly to a coupling unit for providing a shield against leakage from the inner conductor when the connecting plug is removed from the coupling connector. The present invention provides a connection in which the connector is totally sealed against radio frequency leakage when the element is disconnected from the coaxial connector. This objective is accomplished in a structure which obtains a positive contact, which contact is originally maintained.

The present invention is also an improvement in part over my U. S. Letters Patent Number 2,767,267, issued October 16, 1956, as it provides a structure which may readily be adapted as an impedance matching connector.

These and other objects and advantages of the present invention will be understood from the description in the specification set forth below taken in connection with the drawings illustrating the invention in which the figure illustrates a cross sectional elevation of the invention with additional portions of the invention shown in ex ploded form.

As illustrated, there is provided an elongated outer conductor 1 which may be cast or otherwise formed of aluminum or other suitable conductive material. This outer conductor 1 is provided with an outwardly extending annular flange 2 having a recessed section containing a gasket element 3 of resilient material such as rubber. This outer conductor is adapted to fit through a hole in a panel with the gasket material 3 adjacent one side of the panel and with the lock washer 4 and nut 5 on the other side of the panel; the nut 5 being threaded onto the outer conductor over the threads 6, securely holding the conductor to the panel member. The inner coaxial conductor 7 has three sections 8, 9, and 10. Section 8 of this inner coaxial conductor extends through one end of the outer conductor and is aligned and contiguous with section 9. These sections 8 and 9 are held rigidly in place relative to the outer conductor 1 by means of the insulating cores 11 and 12. Core 12 is provided with an outwardly extending flange section 13, fitting closely into the annular shoulder 14 formed on the inner surface of the outer conductor 1. The insulating core 12 extends substantially the length of the coaxial conductor section 9 about the conventional split type spring gripping connector end 15. Coaxial conductor section 8 is secured in position by the insulating core 11 with the outwardly extending flange 16 of this insulating core extending into the recessed section 14 formed on the inner side of the conductor 1. These insulating cores 11 and 12 are further held securely in position by a resilient gasket member 17 positioned between the outwardly extending flange of the core 16 and the inwardly extending edge 18 of the outer conductor. This construction may readily be formed by first inserting the adjacent and facing insulating cores 11 and 12 containing the coaxial conductor sections 8 and 9 into the recessed section 14, following which the gasket 17 is put into position and the outer 2,798,125" Patented July 2, 1957 edge of the outer conductor 1 is spun or otherwise 'suitably forced over the gasket 17. The conductor section 10 is positioned within and securely held by the insulating core 20. This insulating core isslidably longitudinally within the outer conductor 1 between the shoulder '21 and the metal snap ring 22 and is adapted to have suflicient longitudinal motion so as to provide a positiveconnection or opening as hereinafter described.

One end of this inner conductor 10 is provided with the usual split type spring gripping connector end 23 which is adapted to receive the plug-in element for which this connector is to be used. The other end of thisinner coaxial conductor section 10 has a plug-in pin-end24 which is shaped, sized and alignedto fit into the split end section 15 in suitable electric contact. This plug-in end 24 has mounted on it the frusto-conical insulating section 25 which secures the flange section 26 to the core 20. This flange section 26 is made of the same conductive material as the inner conductor 10 and extends outwardly beyond the inwardly extending flange 21 of the conductor 1. The spring element 27 held in alignment by the frustroconical section 28 of the insulating core 12 and by the section 25 tensions the inner conductor member section 10 away from the inner conductor section 9, with the flange 26 tensioned against the flange 21. Also provided on the outer conductor are a pair of studs 30 adapted for use with a bayonet type twist lock on the plug-in element.

In the operation of the present invention, when the plug-in element is disconnected from the connector, the mouth of the connector is totally sealed against leakage by the disc or flange section 26 in contact with the flange 21. In this position the sections 10 and 9 are disconnected from one another and are held in this disconnected position by the spring 27 as illustrated. When the plug-in element is connected and held in position by the pins or plugs 30, the inner conductor section 10 is forced forward until the pin 24 is inserted into the split end 15 of the inner conductor section 9. In this position the flange 26 is disengaged from the flange 21 and the short is thereby removed. In this position the plug-in element is thereby connected directly to the coaxial conductor through the sections 10, 9 and 8.

Having now described my invention, I claim:

1. A coaxial cable connector comprising a conductive outer housing, a fixed and slidable insulating core positioned within said housing, coaxial aligned conductor sections mounted by each of said cores and adapted to be moved in and out of electric contact with one another, means normally tensioning said insulating cores and sections apart with the sections out of electrical contact, and means electrically connecting one of the conductor sections to the conductive outer housing when the sections are out of electrical contact.

2. A coaxial cable connector as set forth in claim 1 wherein the last-named means comprises an inwardly extending conductive annular flange formed on the inner side of said outer housing and an outwardly extending conductive annular flange formed on said section mounted on the slidable core, said outwardly and inwardly extending flanges adapted to engage one another when the conductor sections are out of electric contact with one another.

3. A coaxial cable connector as set forth in claim 1 wherein said fixed and slidable insulating cores are provided with frustro-conical shaped ends facing one another, and said means normally tensioning said insulating cores is a helical spring with its ends fitted over said frustroconical shaped ends.

4. A coaxial cable connector comprising a conductive outer housing, a fixed and a slidable insulating core positioned within said housing, means formed on the inside of said housing for limiting the longitudinal motion of said slidable core, coaxial aligned conductor sections mounted in each of said cores and adaptedto be moved in and out 'of electric contact with one another, means-normally tensioning said insulating cores and sections apart with the'sections out of electrical contact, and means forming a closed electrical circuit between one of the sections and the outer housing when said cores are apart.

5. A coaxial cable connector comprising a conductive outer housing with a longitudinal opening formed therein, a fixed and a slidable insulating core positioned within said opening, means projecting into said opening for limiting the motion of said slidable core, coaxial aligned conductor sections mounted one each in each of said cores and adapted to be moved in and out of electrical contact with one another, helical spring means positioned within said opening adapted to tension said insulating cores and sections apart, and means including an outwardly extending flange formed on said section mounted on said slidable core forming a closed circuit with the means projecting into said opening when said cores are apart.

6. A coaxial cable connector as set forth in claim 1 wherein the last-named means includes an outwardly extending annular flange positioned on said section mounted by said slidable core, and a frustro-conical shaped insulating core mounted on said last mentioned section for securing said flange in position.

References Cited in the file of this patent UNITED STATES PATENTS 1,043,759 Fisher Nov. 5, 1912 1,901,040 Peroni et a1 Mar. 14, 1933 2,447,353 Merrill Aug. 17, 1948 2,646,475 Goodrich et a1. July 21, 1953 

